Automatic gas shut-off.



PATENTED APR. 10, 1906.

G. J. MQGORMIOK. AUTOMATIC GAS SHUT-OFF.

APPLICATION FILED NOV 9, 1904.

CHARLES I. MCCORMICK, AKRON, ()HIO.

AUTOMATIC GAS SHU'I' OFF.

Specification of Letters Patent.

Patented April 10, 1906.

Application filed November 9, 1904:. Serial No. 232,037.

To all whom it may concern:

Be it known that I, CHARLES J. McCon- MICK, a citizen of the UnitedStates, residing at Akron, in the county of Summit and State of Ohio,have invented a certain new and useful Improvement in Automatic GasShut-Offs, of which the following is a complete specification.

This invention relates to attachments for use in connection with fluidfuel burners, whereby the supply of fluid fuel to the burner isautomatically arrested upon the extinguishment of the flame at theburner.

The object of my invention is to provide suitable mechanism for constantuse in connection with a fluid-fuel burner whereby the flow of gasthrough the service-pipe to the burner may be automatically preventedupon the extinguishment of the flame, to the end that in thosecommunities where a fluid fuel is commonly used and where this fuel isliable to fail temporarily there may be supplied with the burner alife-saving device which will prevent an influx of the fluid into abuilding through a burner upon a return of the pressure in theservice-pipe the flame of which has been extinguished by the temporaryarresting of the flow of the fluid fuel. In accomplishing this object ofmy invention I make use of certain novel and peculiar mechanism, oneform of which is hereinafter described, reference being had to theaccompanying drawing, forming a part hereof.

The accompanying drawing represents a side elevation of my improveddevice with certain portions thereof in section to better illustrate theinternal construction thereof.

In the drawing, 1 represents a' burner, which may be of the form shownherein or any other desired or preferred construction best suited oradapted to the work or service to which it is to be applied, and to thequantity and quality of the fluid fuel to be therein consumed, and thisburner may be mounted within the body of a stove, furnace, or otherheating device, onmay be of such configuration as is used for thepurposes of illumination, the general nature of which is an immaterialmatter as far as this invention is concerned, so long as it is adaptedto burn a fluid fuel and produce therefrom a heat-generating flame.

The burner 1 is mounted upon a service pipe 2, in some portion of whichis a valve 3,

to the valve-stem 4 of which is fastened a radial arm 5, having mountedthereon a slidably-adju'stable weight 6.

Placed so that one of its ends will be heated by the flame from theburner 1 is a pipe 7, and the end which is designed to remain with inthe influence of the flame from the burner 1 is closed. At the oppositeend of the pipe 7 and communicating with the interior thereof, is ahollow, preferably cylindrical, box 8, across which is a thin diaphragm9. This diaphragm 9 is preferably held on a shoulder 10, out along theinner side of the shell of the box 8 by soldering. On the centralportion of this diaphragm 9 is a base-plate 11,from which projects astem 12, and around this stem 12 is a coiled spring 13. The outer faceof this box 8 is closed by a rigid plate or cap 14, preferably solderedthereon, through which projects the stem 12.

The stem 12 is arranged to project when the diaphragm is flattened oroutwardly pressed such a distance that the extreme end of the arm 5 canjust rest upon its outer edge, and thus act as a movable abutment tosustain the weighted arm 5 in the position shown by solid lines in thedrawing.

The operation of this device is as follows: The lever 5 is raised to theposition shown in solid lines in the drawing by hand, which permits theflow cffi fluid fuel from the service pipe 2 to the burner 1, and uponthe ignition of the fluid fuel at the burner the heat generated therebywill expand the air within the pipe 7 and the box 8 to such a degree asto slightly flatten or push outwardly the diaphragm 9, as well as thestem 12, until the extreme end 'of the lever 5 can be securely rested onits upper outer end. If for any reason the flame is extinguished, thecooling of the air in the pipe 7 and box 8 will permit the forcingbackward of the diaphragm 9 by reason of the action of the coiled springsituated between the base-plate 11 and the cap 14, which withdrawsautomatically the end of the stem 12 from under the end of the arm 5,permitting it to swing on the valve-stem 4 as a center by reason of itsweighted condition, and thereby close the valve 3.

What I claim, and desire to secure by Letters Patent, is-

' The combination in a device of the class described, of a fluid-fuelburner, a closed pipe having one end thereof situated within theinfluence of the heat of said burner, a box on the opposite end of saidpipe, an air-tight sensitive diaphragm extending across said box, arigid plate extendin across the end of said box outside of saidiaphragni, a projecting stem attached to said sensitive diaphragm andpassing through a suitable'opening in said rigid plate, a spring on saidstern engaging said rigid plate to assist the movements of saiddiaphragm, a valve in the servf ice-pipe of said burner, an arm capableof actuating said valve and attached to the valvestem thereof ofsuflicient length to engage l said stem when said diaphragm is undercompression, whereby said arm is sustained against movement, and anadjustable eight on said arm.

In testimony that I claim the above I here unto set my hand in thepresence of two subscribing witnesses. s

CHARLES J. MCCORMICK In presence of C. E. HUMPHREY, GLENARA Fox.

